Trolley.



JOSEPH R. EISAMAN, OF LATROBE, PENNSYLVANIA.

TROLLEY.

intense.

Specification of Letters Patent.

Patented Sept. 16,1913.

Application filed October 14, 1911. Serial No. 654,672.

To all whom it may concern:

Be it known that I, JOSEPH R. EISAMAN, a citizen of the United States of America, residing at Latrobe, in the county of l/Vestmoreland and State of Pennsylvania, have invented certain new and useful Improvements in Trolleys, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to trolleys, and the primary object of my invention is to provide a novel harp that will reduce the tendency of a trolley wheel to become displaced to a minimum, thereby insuring a safe operation of a car, particularly on grades and curved sections of track.

Another object of this invention is to provide a swiveled and oscillatory harp that can be advantageously used in connection with high speed suburban electric trolley systems.

A further object of my invention is to provide a strong and durable roller bearing harp that is inexpensive to manufacture and highly efficient for the purposes for which it is intended.

lVith the above and other objects in view the invention resides in the novel construction, combination and arrangement of parts to be hereinafter specifically described and then claimed.

Reference will now be had to the drawing, wherein Figure 1 is a side elevation of the harp partly broken away and partly in section. Fig. 2 is a cross sectional view of the same, and Fig. 3 is a plan of a harp support.

The reference numeral 1 denotes a portion of a pole having the upper end thereof provided with diametrically opposed arms 2 and keyed or otherwise mounted in said arms is a transverse pivot pin 3. Pivotally mounted upon said pin, between the arms 2 is a support 1 having the upper end thereof provided with a central head 5 and the lower end with a depending rod 6. The rod 6 is provided with equally spaced transverse openings 7 having a key or cotter pin 8 employed for retaining a weight 9 upon the rod, said weight having a vertical opening 10 providing clearance for said rod. The head 5 has an annular race 11 and a central boss 12 provided with a socket 18 having the walls thereof screw threaded. Arranged in the race 11 are anti-frictional rollers 1-1 supporting the central base 15 of a harp 16. The base 15 of the harp has a central opening 17 providing clearance for the boss 12 and mounted in the socket 13 of said boss is a screw 18 having a large flat head 19 that rotatably retains the base 15 of the harp upon the rollers 1 1. ltevolubly mounted in the harp 16 is a conventional form of trol ley wheel 20. The weighted or pendulum end of the support 1 is adapted to normally retain the support in a vertical position and at right angles to a wire, rail or conductor upon which the wheel 20 travels. The sup port 4 can swing however when any irregularity is encountered in a trolley wire or whenever the trolley wheel 20 strikes a hanger wire or other overhead construction. l Vith the harp swiveled upon the support the wheel of said harp can readily adjust itself to the curvature of a wire. The antifrictional rollers are protected from sleet, snow and the forces of nature by the base 15 of the harp and the construction of the harp permits of easy access to the rollers for lubrication purposes. The sensitiveness of the harp and the wheel thereof to irregularities or obstructions can be regulated by adjusting the weight 9.

lVhat I claim is 1. A trolley comprising the combination with a pole having a bifurcated upper end, of a counter-balanced support pivotally mounted in said bifurcated end and projecting from above, bearings mounted in and extending above said support, and a trolley wheel carrying harp mounted upon said bearings and connected to said support.

2. A trolley comprising the combination with a pole having a bifurcated upper end, of a support including a reduced lower portion and an enlarged grooved upper portion,

means extending through the reduced lower In testimony whereof I affix my signature portion for pivotally connecting the support in the presence of two Witnesses. in the bifurcated upper end of said pole, antifrictioned rollers mounted in the grooved JOSEPH R EISAMAN 5 upper portion and adapted to support a har base and an ad'ustable counter-bah Witnesses:

7 c anced member dependlng from the reduced A. J. DEGITZ, portlon of said support. H. FRY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

